Exam 2 Flashcards
Head-sparing
A biological mechanism that protects the brain when malnutrition affects body growth. The brain is the last part of the body to be damaged by malnutrition
Percentile
A point of a ranking scale of 0 to 100. The 50th percentile is the midpoint; half the people in the population being studied rank higher and half rank lower.
REM Sleep
Rapid eye movement sleep, a stage of sleep characterized by flickering eyes behind closed lids, dreaming and rapid brain waves
Co-sleeping
A custom in which parents and their children (Usually infants) sleep together in the same room.
Neurons
The billions of nerve cells in the central nervous system, especially the brain.
Cortex
The outer layers of the brain in humans and other mammals. Most thinking, feeling, and sensing involve the cortex. (Sometimes called the neocortex).
Prefrontal Cortex
The area of cortex at the front of the brain that specializes in anticipation, planning and impulse control.
Axon
A fiber that extends from a neuron and transmits electrochemical impulses from that neuron to the dendrites of other neurons.
Dendrite
A fiber that extends from a neuron and receives electrochemical impulses transmitted from other neurons via their axons
Synapse
The intersection between the axon of one neuron and the dendrites of other neurons.
Transient Exuberance
The great but temporary increase in the number of dendrites that develop in an infant’s brain during the first two years of life.
Pruning
When applied to brain development, the process by which unused connections in the brain atrophy and die.
Experience-expectant brain functions
Brain Functions that require certain basic common experiences (which an infant can be expected to have) in order to develop normally
Experience-dependent brain functions
Brain functions that depend on particular variable experiences and that therefore may or may not develop in a particular infant
Shaken Baby Syndrome
A life-threatening injury that occurs when an infant is forcefully shaken back and forth, a motion that ruptures blood vessels in the brain and breaks neural connections.
Self-righting
The inborn drive to remedy a developmental deficit; literally, to return to sitting or standing upright, after being tipped over. People of all ages have self-righting impulses, for emotional as well as physical imbalance.
Sensation
The response of a sensory system (eyes, ears, skin, tongue, nose) when it detects a stimulus
Perception
The mental processing of sensory information when the brain interprets a sensation. Perception occurs in the cortex.
Binocular Vision
The ability to focus the two eyes in a coordinated manner in order to see one image. The ability is absent at birth.
Motor Skills
The learned abilities to move some part of the body, in actions ranging from a large leap to a flicker of the eyelid. (The word motor here refers to the movement of muscles).
Gross Motor Skills
Physical abilities involving large body movements, such as walking and jumping. (The word gross here means “big.”)
Fine Motor Skills
Physical abilities involving small body movements, especially of the hands and fingers, such as drawing and picking up a coin. (The word fine here means “small.”)
Immunization
The process of protecting a person against a disease, via antibodies. Immunization can happen naturally, when someone survives a disease, or medically, usually via a small dose of the virus that stimulates the production of antibodies and thus renders a person immune. (Also called vaccination).
Protein-Calorie Malnutrition
A condition in which a person does not consume sufficient food of any kind. This deprivation can result in several illnesses, severe weight loss, and even death.
Stunting
The failure of children to grow a normal height for their age due to severe and chronic malnutrition.
Wasting
The tendency for children to be severely underweight for their age as a result of malnutrition
Marasmus
A disease of severe protein-calorie malnutrition during early infancy, in which growth stops, body tissues waste away, and the infant eventually dies.
Kwashiorkor
A disease of chronic malnutrition during childhood, in which a protein deficiency makes the child more vulnerable to other diseases, such as measles, diarrhea, and influenza.
Sensorimotor Intelligence
Piaget’s term for the way infants think–by using their senses and motor skills–during the first period of cognitive development.
Primary Circular Reactions
The first of three types of feedback loops in sensorimotor intelligence, this one involving the infant’s own body. The infant senses motion, sucking, noise, and other stimuli and tries to understand them.